I did some search and all the links say that it has normal steering ratio that is 14:1.
And yes, many links say it is impractical for lower speeds.
I think probably someone at Tesla probably got used to it, and concluded that its better, because it gives more legroom, or something...
But whether majority of customers are facing usability problems, or even if they're not, Tesla should offer a choice of round steering wheel. Simple.
To me, it looks like a usability nightmare from this distance, no matter how cool it looks.